The second member of the Avebury group is the double circle, or rather double oval, on Hakpen hill--Haca's Pen;[79] this was, according to Stukeley, 138 feet by 155 feet, and had an avenue 45 feet wide, as compared with 51 feet which Sir R. C. Hoare gives for those of the Kennet avenue of Avebury. The avenue is supposed to have extended in a perfectly straight line for above a quarter of a mile, pointing directly towards Silbury Hill, which is about one mile and a quarter distant. The third member of the group is the famous Silbury Hill, about a mile distant due south from Avebury. That these two last named are of the same age, and part of one design, seems scarcely open to doubt; but it is quite an open question whether Haca's Pen belongs either to the same age or the same design. Its stones were very much smaller, its form different, and its avenue pointing towards Silbury looks as if that monument existed, and may have long existed before it was built; but of this hereafter. Besides these three there are numerous barrows, both long and round, in the neighbourhood, and British forts and villages; but these we propose to pass over at present, confining our attention in the first instance to the three monuments above enumerated. The first question that arises on looking at such a structure as Avebury, is whether it is a temple at all. It has already been attempted in the preceding pages to show what the temples of Britain were in the ages immediately succeeding the Roman occupation; but even if it is conceded that they were small basilicas, it will be contended that this is no answer to the question. If Avebury, it will be said, is a temple, it belonged to a mysterious, mythical, prehistoric people capable of executing such wonderful works before they came in contact with the Romans, but who, strange to say, were incapable of doing anything after the civilizing touch of that great people had left them feebler, and more ignorant than they were before! If this question, What is Avebury? is addressed to one--brought up in the Druidical faith as most Englishmen have been--he at once answers, It is a temple of the Druids. If pressed and reminded of the groves and the oaks these sectaries delighted in, he will perhaps admit that no soil is so little likely to grow oaks as the chalk downs of Wiltshire, and that there is no proof that any oaks ever grew in the neighbourhood. But this is not a complete answer, for it may be contended that for some reason we cannot comprehend, the Druids may have dispensed with trees on this occasion. The real difficulty is, as before mentioned, that no stones or stone structures are ever mentioned in connection with Druids.